body{
    /*background: url("../img/bg4.jpg") ;*/
    background-attachment: inherit;
    /* background-size:cover; */
    padding:50px 0 20px;
}
.my-footer{
position:fixed;
bottom: 0;
width:100%;
background: #2E80D1;
z-index:100 ; 
text-align: center;
}
/*聊天界面*/
.a-message{
    padding-left:60px
}
.user-head{
    display: inline-block;
    width: 50px;
    height: 50px;
    float:left;
    margin-left:-60px;
    border-radius: 50%;
    border:  1px solid #ddd;
    background-image: url("../img/user_image/T-B.png");
    background-position: center;
    background-size:50px 50px;
    background-repeat: no-repeat;
}
.char-message{
    text-align: left;
    border-radius: 5px;
    padding: 5px;
    background:#dddddd ;
}
.user-name{
    font-size: 12px;
    color: #9c9c9c;
    padding:5px;
    display: block;
}
.my-bg{
    position:fixed;
    top:0;
    z-index:-100;
    width:100%;
    height:100%;
}
.my-logo{
    width: 100px;
    height: 50px;
    background-image: url("../img/logo/TangSh-B.png");
    background-position: center;
    background-size:100px 50px;
    background-repeat: no-repeat;
}